Cal. Educ. Code § 17220

If the State Allocation Board determines a school district to be exempt from the requirement to make nonuse payments for any year as to any schoolsite on any basis authorized under subdivision (e) or (f) of Section 17219, that exemption shall continue to apply to that schoolsite for each subsequent year for which the superintendent of the school district certifies to the State Allocation Board, on a timely basis, that the basis of exemption continues to exist.